NHTSA Complaint #11698152 — 2015 CHEVROLET SILVERADO 1500

86K miles smelled gas. Dealer replaced one fuel injector on the 6 cylinder rail. At 108K miles, catastrophic engine failure caused by misfire in the #6 cylinder. No compression or diagnostic testing done at initial fuel injector replacement. It is now my understanding that it is good practice when replacing one fuel injector, all should be replaced. After truck was inoperable at 108K miles, ran a borescope into the 6 cylinder shaft and noticed massive wash and scoring. Goodwill from GM was denied for an engine swap. Subsequent diagnostic testing revealed low pressure in all cylinder heads. I don’t put a lot of miles on this truck per year and suspect the problem compounded over time without notice. There was gas mixture in the oil, however this issue was never brought to my attention during routine maintenance and oil changes. I know there were issues with the 6.2L and didn’t know of parallel or residual issues with the 5.3L. Long story short, I had to go with an engine swap on a truck with relatively low mileage.